Feature/warnings (#1885)

Remove many warnings from MSVC, Clang, and GCC

src/interaction/keybindingmanager.cpp

@@ -35,10 +35,6 @@
 
 #include "keybindingmanager_lua.inl"
 
-namespace {
-    constexpr const char* _loggerCat = "KeyBindingManager";
-} // namespace
-
 namespace openspace::interaction {
 
 KeybindingManager::KeybindingManager()